Motor for locomotive gathering-reels.



1. LE C. DAVIS. MOTOR ma LOCGMOTIVE GATHERING HEELS.

APPLICATION F iLED MAR. 2. 1912. *3 a Q r 1 ,U6,309 Patented Nov. 28, L111).

2 SHEETS-SHEET1- ATTORNEY WITNESSES:

.H VMAMM J. LE C. DAVIS.

MOTOR ma Locomqnvs GATHERING REELS.

I APPLICATION "LED MAR. 2. H2. 1,206,309. Patented Nov. 28, 1916.

2 SHEETS-5HEET 2.

$ $211 Awkward is INVE iN 0H WITNESSES:

305MB 09mm news, orirxfmsnvnq g rExnsynvAmA, Assi'enogmo w smm HOUSE. answers- 4m) MANUFACTURING COMPANY, A comoemlo'n on Pmmf. T aaZZ whom at may concern:

1Q lpiniiiglocpmotives and similar d'eviees' inf-3 w has special reference to. e1ectrie'mptqr kja iven 'l elfs of this character;

The object of my mven to n 1s to fproi i'de 3- 591 of theq'class aboye indicatedfand an l5. electric motor which isfspeci ally adapted for Operating 1the' same. .Anothrebyech of myinvention-11am 121701 vide a meter -.c1 1'i ven gathering reel for min- :10ppm0tives for the. purpose biz-reeling 05111 or gathering -i70pe. worfceble-jiflglien the lbco'motive is advanced-inaxfbi'wzucl; direc-' tion towardfth ,ea-bleflan'd, folz-perniittingm restricted payi lig out-f .c-zxblewhen-"the 16- c'pniqtive- ;s 0peratedin the opposite diree- 111011. away from theqable; 1

. A. 0111 further 'obfiae fmy' invention 1's "to provide" a gatheii'ng reel thaii is operatively or paying it; out. .p'uriiig the gathering pera'tion' the motmf dri ve's the'j reel To: Wind'- v degree-sing torque eha reeteristics during the x backward peymg gut ppm-$1011 m 'mavlntajm the. eabliunder a-glighi i bensiemwithput pen 'sb mmibn .o f Letmr q tem. f- Applicatien med li b: 2, 191 2, seria; 1m. 631,268.

'1' women .303 LOCOMOTIVE GAIIJHIERINGI-REELSI.

Patented Nov 23,1916.-

tions for mining;loeombti-ves of theftype 55.

underconsiderationare-3 1 ba'd ,an d th'erefpre the operable-n of such= locomotlves 1s hmlted,to i'elat vely lowspeeds when gizithpml speedef eper ationginmind, the I]10t0). 1s designedso. th'ntythe en que du'l mg both. operations asnproper a-o meet- "the peculia'ritie's of; the-service, whereby the results hereifibefore.mentibned are accomplished.

In (go-pending application, Serial No. 6i9 983,'filed-September 18, 1911 by George M. Eaton and myself, shown and described locomotive gathering reel-having .an independent driving. motor mounted,

withiniighe. drgm; 0f the tee] and operative-1y? connected to it by-suitable' gearing.

.Whilefthe.aimpf, my' present invention is' to prlmzi del an gelectrio r'nc'flzolc;having chap 5 'aetepietics which peculiarly adapt it forr'.

driving gathering 'reels fitiis not restrictedin its: field. pf: usefulness to: any parjsiciflar type '0fc' 1"-ee1, although. l'prefer to utillze the abox e-naiyi-edw-Egton' and Dgujis application. Figure-l af the aceqmpzinylng draiwingsis' set'ting fetthg by' means efjcuryes, the motor" ,tOlQil-; the 131111 exertedaonthe ropeflcir cable. when .u11 winding,*and the-*piill exerted" on 85 egainst the speed,iin milesperhour, offlthe'f I lqcometiye .01 which the gathering reel- .is

motor"characteristicstire secured:

motbr ham 1 "shown comprises. a; rotat ble .i' ermo m-upp df i he I 1 .an'y flgitable lco'nstzmt kp'otenti al' .soproe:..vo4 energyg gthrqughfline conduetorsjll'and 12f across-Which ghmmgmm and the. resist0 1--. 105- j seri'sjreletioni; T ea-em, I i

resistor S, as clearly shown in Fig. 3. The effect of this arrangement and these con ncctions is to produce characteristics, which peculiarly adapt the motor for operating a locomotive gathering rec-l. These characteristics are set forth in the curves of Fig. 2, to which special reference may noiv' be had. The curve A- indicates the motor torque for various locomotive speeds in u. torwahl and a lnu'kivard direct-ion.

Assuming that the gathering reel motor is continuously supplieil with electrical energy from the line cmuluctors 11 and 12, as is customary in this class of apparatus, and thatl'hc locomotive is'ut a standstill, a relatively heavy curl-outflows through the series circuit conipriinng the resistor 3' and the armature 1, and a relatively light current traverses the field magnet winding: since bv far the major portion of the voltage applied to the ahoveanentioncil series circuit is absorbed in' the resistor 3, by very low resistance of the armature \'vi11(l ing, as Will he understood. The motor torque which, as iswcll known, is proportional to the prmluct 01 held magnetic flux and the (ac-acting armature current, assumes,

consequently, a [H'UdfltQlllllllttl value-which.

may he represent-ml by the letter"T.

Whenever the gatheringreel motor is rotating in the direction in. \v'hichit'tendsto move, that is, when-the cable is being reeled in, a counter E. \L. 1%. is set up inthe arm, r

ture and, as a result, the series circuit currcnt is considerably reduced. However, the.

greater part of the-line voltage is now, impressed' across the armature, on account of the small IR clrop' in the rcsistor3. The voltage across the field magnet winding 2 is, therefore, greatly increased and the result not increased fichl flux in conjunction with the armature current produces a. torque greater than T, as indicated-by curvoA.

\-Vhen the reel motor is bein rotated in opposition to itsown torque, that is, when 'tl'iccablcisbcing paid out, the E. M.- F; generated in the machine .isin the some; three tionas the line E. M. F. Consequently, a. licavy'current again flows through the resister ,3 and the armnture 1, I11Ply 'll1 of the linefvoltagc being consumed in the rcr rent through the arn'iature.

sister, for the following; reason.. on he .count of the mutual assistanceof the line and generated; E. M. Fs, a very low armat-urc voltagc is obtained, intact one that is merely suilicient to drive the requisite cur- .-'\s a, result, a very low E. M. FwlS ilTiPlUSSBd across the is produced. .The machine torquetherefore amines .a' value somewhat less than-T, and

gratlually-falls oli' as'the speetl'isincrcaserl,

reason of the.

'point' c, which comes};

.my gathering reel niot'o't: --1( are a pproxnn atccl for u nirlirecti 0'1 u'rl torquefor contlpuously exert n ings of the reel and in the driving gears acts in'opposition to the motor-and, consequently, must be subtracted from tlie motor torque vhile the locomotive travels in the direction adapted to reel in the cable"; whereas, when the cable-is being paid-cum} the forcethereon must not only be suflicit'ntfito overcome the opposing motor torque, hut-must also 0 ovcrcoinethe resistingf1" io'nlosses in the reel, is indicated by curv I y When. the locomotive is t aveliilg i a forward dircctionjancl the reel 13 gathering'thic. 111110, the tor-q'ue of the; reel; motor anclthe pull on the cable ar .Prefer-allyincreased with the speed. in'orilei "to insure a taut;

motive. wheels passing over On the other hand, lli'c t o I motor SllOllltI-llfifll'tilfi tithe. 'eeclof, the locomotive lrl'CflSlS in. ail sarlavai'd direc- 5 tion in order to avoid. rupturing or straining the-cable, while mai x'it-aiihing it"reason" ably tight and prevcnting it from being run out too freely. f v

The curve G (Fig. 2) cleerlyindicalfis-thct the pull at the-cable iiicre vith" the fori'zirdly increasing loco witlrtherecl in operation. I

The curve B 'showsfithat. the; pull at the cable decreases with the heel \YfliClly. increasing locomotive speed to, a-fpoint 5?), which conv responds to' full. speed with, h 'reelinoperation. l L i It is therefore evident that, liv'the-use- 0flaconditlons lirecti'bns of lo- I both comotive-operation.

In its broadest aspect-Tinyinvention is not restricted to the particular structural cletails, arrangements and 1- and circuit connections an ation heroinset forth. h cases, the locomotive inn rest and the-cable may thereto. l urthcrmorc, plicahle. toother ficlds of act upon a; mechanical a upon thereby}, provide load are'bodily-niovab to the other.x. v

I claim as, my inventi 1. The vco,nihi'natic gatheringfreel,therefor of for contin 'ou'sly exert torque np'on". s id reel and turc upon which a predeterm ing voltage isi npressed n winding upon, .u hichj 1i, (1i impressed. v

2. The "combination. A gathering rejel'ithercioi' 0 cable in one'sdircction that ejawinding speed thereof and havingian arma ture, a resistor in seriestherewith, and a field magnet winding in shunt'circuit relation to the armature and a portion of the resistor. i

3. Fhe combination with a locomotive gathering reel, of an electric motor comprising an armature, a resistor connected in series therewith and a field magnet windingconnected' in shunt relation to the armature and a portion of the'resistor and adapted to exert a decreasing. torque on said reel as the locomotive speed increases in one direction and an increasing torque thereon as the 10- comotive speed incre'ascsin the opposite direction; I

l. The combination with an electric motor mounted transversely upon a movable body and comprising an armature, a resistor' connected in' series relation therewith, and afieldmmgnet winding entirely connected between the free terminal of the armature and a. permanent intermediate point in the resistor, of n meohanical load that turns the motor armature during its lateral move ment in one direction and'is operated by the motor during its lateral movementin the i opposite direction.

I 5;The combination with a: locomotive gathering reel, of an electric motor comprising an armature, a resistor connected in series therewith and a field magnet winding connected inshunt relation to the; urma ture and a portidn of the resistor and adapt} ed to evert a decreasing torque on said reel as the locomotive speed {increases in a direction to unreel the cable and an increasing torque thereon. as the-locomotive speed increases in a direction toreel} the cable.

(L The combination with an electric-'motor mounted upon a forwardly and baokwardly movable body and comprising an armature, a resistor connected in series relation, there with, and a field-magnet winding connected across thearmat'u re and a portion of said resistor and characterized by a'qtorque.

that substantially varies Ldirectlyfwith the speed in-one direction '0 rotation and in versely with the speed in thcoppo'site directio n,- of emechanical-.load-v that turns the rection:''i;.

, 7. The combinationwith an electric nriot'or mounted transversely :upona movable body and comprising. an armature, a -reslstor per.-

manently connected in series relation therewith and-a field-magnetiwinding connected acrliss the armature and a portio'n @of said resistor and characterized byatorque that substantially varies directly. with the speedin its natural direction of rotetiormind"iii-- ,versely with the speed -in the oppositddi-f rection, of a mechanical load that overcomes relation therewith and a field magnet windtherewith an 1 across 7 the armature [and a "motor beingunidireeti'onallygene}; oed motor amneture'when tl1em0tor--is. -moved" fromsaid-source', irrespective oil-thefd'tiee hlodily in one direction fandis operated by t 'e motor whenfimove'd vin the oppositedig 4 the diminishing motor torque when the mo tor is movedlaterclly in one direction and is overcome by the increasing tor ue when p nected in series-relation therewith and a field-magnet winding permanently connecte'd across the armature and a redetermincd portion of said resistor, where y the voltage of said source is apportioned to produce a resultant mo'tor torque that increases with forward running speed and decreases With said motor to produce rotative movements thereof when the motor is moved in a backward direction.

.9. The combination with a source of energy, an electric motor comprising an armature, a resistor connected in series ing permanently connected across the armie ture and a predetermined portion of said resistorpwhereby the voltages respectively impressed npon" the] armature and field windings substantially :varysinversely with the motor current, of 'af mechanical load having. relative translative movement with respect. to said" motor and, adapted to be acted upon by said motor during relative translative movement. in one direction-and 'to" act upon said motor -to' effect rotative movements of said armature during relative translative movement. in the "opposite direction.

.hackward running speed ofa mechanical Iload that is acted 'upon by said motor d-ur- "111g its forward movement and acts upon '10. Inan electric vehicle, ,the combination with ii-source .ofie'nergy, a'supply; cable 0011- nectedto said-source; a gathering reel for. said cable, and i mprising' an arnieturey-a resistor connected in series relationtliere wfith'janda' field magnet winding connect? predetermin dall circuitsb portion, ofsaid -'resisto r',-.

tion of armaturerotetion, whereb' -%li -voltages respectively impressed ppolf arm inverselywith the motor currentjto,produce},

. electric motor associated, I f io a pull on said cab1e.'that.-i11iresee with'the speedof nature-l rotationof'flil'e motor when anelectric mo;-

et winding v e armature; and

s unidi ctional torque mature, a r istor m-series ab Y a portion' of the resieto'r', of emechanical 'lood adapted to act upon said motor to turn mid armature against the motor torqpe and to be acted uponby said motor dorm its normal operotiomeaid'motoz' and said and being adapted for relative bodily movement with respect the one to the other.

12. The (fombination-ofv an electric motor and a mechanical load adapted for relative bodily movement in oppogite'directions with respect the one to the other, said load being udep'ted to be acted upon by said motor during relative movement iii one direction and to act upon said motor. t'odrive it during relative movement in the opposite direction, and said mot-or beirig adaptedto produce t decreasing torque when acted u on by the load and an increasing torque W on acting upon said load.

2 1-3. In, locomotive aiiapted to be operatedin opposite direo tio nis, the combination with an electric motor. comprising an armatore; a resistor in 'series' relation therewith and a field-magnet winding connected apross' said imnuture and a portion of Suit! resistor,

said motorbeing adopted to exert different torques in accordance iwith'the directio i of" movement of said locomotive on mechaniturns the motor armature dining onedirection of mov'ementof said locomotive and is.

cal load associated with and motor thet 

